This includes a fixed per platform component and a dynamic component that takes into account the current pool residency mip bias.
#rb ben.ingram
#preflight 615c8efd184ecf0001211c86
#lockdown michal.valient
#ROBOMERGE-AUTHOR: jeremy.moore
#ROBOMERGE-SOURCE: CL 17725859 via CL 17979595 via CL 18366901 via CL 18366958
#ROBOMERGE-BOT: STARSHIP (Release-Engine-Staging -> Release-Engine-Test) (v895-18170469)
[CL 18366976 by jeremy moore in ue5-release-engine-test branch]
#rb ben.ingram
#preflight 615c476d8c8edf00011b2a2a
#lockdown michal.valient
#ROBOMERGE-AUTHOR: jeremy.moore
#ROBOMERGE-SOURCE: CL 17720292 via CL 17979487 via CL 18366651 via CL 18366733
#ROBOMERGE-BOT: STARSHIP (Release-Engine-Staging -> Release-Engine-Test) (v895-18170469)
[CL 18366795 by jeremy moore in ue5-release-engine-test branch]
#rb ben.ingram
#preflight 61563a656ed55a0001763a45
#lockdown michal.valient
#ROBOMERGE-AUTHOR: jeremy.moore
#ROBOMERGE-SOURCE: CL 17684931 via CL 17967447 via CL 18366105 via CL 18366199
#ROBOMERGE-BOT: STARSHIP (Release-Engine-Staging -> Release-Engine-Test) (v895-18170469)
[CL 18366306 by jeremy moore in ue5-release-engine-test branch]
Use this as id for recording and playback of virtual texture feedback.
Flesh out API for recording and playback of collected ids.
#preflight 61530aa080eba00001a511b6
#rb ben.ingram
#lockdown michal.valient
#ROBOMERGE-AUTHOR: jeremy.moore
#ROBOMERGE-SOURCE: CL 17653384 via CL 17965453 via CL 18365635 via CL 18365739
#ROBOMERGE-BOT: STARSHIP (Release-Engine-Staging -> Release-Engine-Test) (v895-18170469)
[CL 18365816 by jeremy moore in ue5-release-engine-test branch]
Producers will be randomly distributed between physical pools.
The maximum physical pool tile size is set by r.VT.SplitPhysicalPoolSize.
Setting a size of 64 will force all pools to be divided so that their page tables fit in 16 bits.
This makes it possible to use large physical pools without doubling the cost of page table memory.
#rb none
[FYI] ben.ingram
#preflight 611a616a8ff5540001cf6575
#ROBOMERGE-SOURCE: CL 17175504 via CL 17175510
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v855-17104924)
[CL 17175517 by jeremy moore in ue5-release-engine-test branch]
Enable with r.VT.Residency.Notify
Default VT residency mip map on for default pools.
This is overridable per project and per pool.
#rb none
#preflight 61128bb272fe2c00013a846c
#ROBOMERGE-SOURCE: CL 17116695 via CL 17116736
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v855-17104924)
[CL 17116751 by jeremy moore in ue5-release-engine-test branch]
This outputs the physical tile footprint of each VT producer.
Useful for finding producers that are using up most of the physical cache.
#rb none
#preflight 6108b0b72b00280001195a54
#ROBOMERGE-SOURCE: CL 17025048 via CL 17025049
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v839-17012307)
[CL 17025051 by jeremy moore in ue5-release-engine-test branch]
#rb none
#preflight 61083a1e4cd793000148efcb
#ROBOMERGE-SOURCE: CL 17019668 via CL 17019684
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v839-17012307)
[CL 17019696 by jeremy moore in ue5-release-engine-test branch]
#jira UE-109349
Add mip map bias for virtual texture sampling.
Respects the existing r.MiipMapLodBias CVar.
Also add residency tracking for each virtual texture physical pool.
If the pool has been created from a config with the bEnableResidencyMipMapBias flag set then a mip map lod bias is applied to bring the pool back within budget.
The residency mip map lod bias is applied globally (combined with the global mip map lod bias).
In future it could be good to apply the mip map lod bias per physical pool, but this will require tracking all physical pool combinations for each page table.
Physical pool residency tracking can be shown on screen with r.vt.residency.show CVar.
#rb ben.ingram
#ROBOMERGE-SOURCE: CL 16724483 via CL 16724487
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v835-16672529)
[CL 16724488 by jeremy moore in ue5-release-engine-test branch]
- This should be much faster than previous code which attempted to map all mip levels
- Need to ensure at least lowest resolution mip is mapped, in order to avoid rendering frames with garbage data mapped
- Add warning for AllocatedVTs that never manage to complete this mappings
#rb none
#jira none
#ROBOMERGE-SOURCE: CL 16308484 in //UE5/Main/...
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v800-16297934)
[CL 16308810 by ben ingram in ue5-release-engine-test branch]
- Instead, keep VT cached for a few frames after they are deleted, this way they can be re-used if they're deleted/recreated due to state changes
- This should solve the problem of material changes causing pages to become unmapped for a few frames
#rb none
#jira none
[CL 16209506 by Ben Ingram in ue5-main branch]
With lots of VTs per material, pages may not be 'touched' by the CPU every frame they're used, this threshold will help prevent these pages from being re-used too early
Effectively this will make the 'VT oversubscription' message more likely to appear, but this should more accurately reflect the actual load on the system
#rb none
#jira none
[CL 16208261 by Ben Ingram in ue5-main branch]
- Need to include LocalMipBias, otherwise may not be any data at AllocatedVT's MaxLevel for sparse UDIMs
- Check for overflow when adding lock requests, keep overflow requests around to try again next frame
#rb none
#jira none
[CL 16194638 by Ben Ingram in ue5-main branch]
- It's not possible to make wrapping work correctly for lower mip levels, depending on the sizes of the VTs in the stack
- Now UDIMs that are smaller than stack dimensions will just map the lowest resolution mip to out-of-bounds addresses
- Entire stack will continue to wrap, based on the stack dimensions
- End result is UDIM wrapping should no longer by relied on
#rb none
#jira none
[CL 16184868 by Ben Ingram in ue5-main branch]
- Fix how local mip bias is applied
- Fix a few inconsistencies with how various vLevels are computed
- Rename some values to try to be more consistent between vLevel, Local_vLevel, Mapping_vLevel, vLogSize, etc
#rb none
#jira none
[CL 15947986 by Ben Ingram in ue5-main branch]
